Hi Clemens,
Hi Roman,
You keep creating and adding new listeners without ever removing them.
Of course this is going to leak.
What makes me wonder, I add the listeners to an Action from a newly
created JTextArea.
Shouldn't the action belong to the JTextArea itself and be
garbage-collected too when the JTextArea is no longer reachable? (like
its the case for Listeners attached to the Component directly like
Mouse/Key/...-Listeners)
In the case of Notepad, that would mean Swing would require the
application to remove the listeners manually?
In common case you shouldn't remove listeners of course. But in your
case you must remove listeners because of editor is shared between all
JTextComponents (see javadoc of the JTextComponent#getActions method and
BasicTextUI#getEditorKit implementation). So you added listeners not to
a JTextComponent instance, but to the shared editor.
I have to admit I don't understand the concept of Actions in detail...
It's not even related to the fact that
the listener references the array (although that could play a role in
more complicated leaking scenarios)
Sure, the array is just there to trigger the OOM faster ;).
Thanks, Clemens
Regards, Pavel
